Help with Double Sided and Transfer Tapes specifications:

With double-sided tapes and films, both sides of the backing or carrier are coated with adhesive. Two different pressure sensitive adhesives (PSAs) can be used on each side. This is useful for applications that involve bonding together very dissimilar materials. Double-sided products are supplied with a coated release liner.

Transfer tape is a highly versatile product that consists of a thin adhesive film without a carrier or backing. It can be readily transferred to most dry surfaces from a peel-away release liner.

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Fluoropolymer films, layers, or coatings consist of plastics such as polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF). Fluoropolymer coatings are used in applications that require superior chemical resistance, good dielectric properties, and water and stain repellent characteristics. Fluoropolymers are also used in applications where the material handled must not stick to the belt, fabric, or laminate. Polytetrafluoroethylene (PTFE) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials such as Teflon®, a registered trademark of DuPont Dow Elastomers.

Plastic products incorporate one or more plastic layers, or consist of plastic film or sheets that can be clear or colored, printed or plain, single-layered or multilayered, and combined with materials such as aluminum and paper. There are two general categories of plastics: thermoplastics and thermosets.

Polyimide film maintains excellent physical, mechanical, chemical, and electrical properties over a wide range of physical environments. Kapton® tape is made of polyimide film and a heat-resistant, silicone adhesive. Kapton is a registered trademark of DuPont Teijin Films. Polyimide films are very useful substrates for the manufacture of flexible circuit materials.

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Heat activated, thermally activating, or heat bond adhesives become tacky or sticky when heat is applied. The adhesive may soften, but not necessarily melt. Hot melt adhesives can be repeatably softened and melted by heat, and hardened or set by cooling. Cooling allows the removal or repositioning of parts during assembly.

Pressure sensitive adhesives (PSAs) or contact adhesives are aggressively and permanently tacky at room temperature in dry (solvent free) form. They adhere firmly to a variety of dissimilar surfaces upon contact, requiring only the application of finger or hand pressure. PSAs do not require water, solvent, or heat activation in order to exert a strong adhesive force on materials such as paper, plastic, glass, wood, cement, and metal. PSAs have a sufficiently cohesive holding and elastic nature so that despite their aggressive tackiness, they can be manipulated by hand and removed from smooth surfaces without leaving a residue. In terms of general trade usage, leading tape manufacturers do not sanction the extension of the term “pressure sensitive” to include tapes and adhesives just because they are sticky (e.g., fly-paper), or just because they adhere or cohere.

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Thickness is the distance from one surface of a tape, film, or laminate backing or adhesive to the other. It is usually expressed in mils or thousandths of an inch, and is measured under slight pressure with a special gauge.

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Tapes or film products have anti-static, static dissipating, or electrostatic discharge (ESD) control features. Typically, ESD control products have conductive, friction reducing, or ionizing characteristics.

Electrically conductive products can conduct electricity and provide protection from electrostatic discharge (ESD). They may also provide shielding from electromagnetic interference (EMI) or radio frequency interference (RFI). Conductive tapes and films are used in electrical heating elements and other electronics applications.

EMI or RFI shielding products can provide protection or shielding from electromagnetic interference (EMI) or radio frequency interference (RFI). Most shielding products use a conductive material to surround the device or equipment requiring shielding. Conductive EMI shielding works on the electric field portion of the electromagnetic wave or interference. Magnetic shielding is less common.

Reflective films are used to control radiant heat or enhance display brightness. Reflective tapes are highly visible and provide warnings about unsafe conditions. Reflective tapes are used in rotating or moving equipment to trigger proximity sensors, or enable a tachometer to make readings.

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